Aloha to all. At last the handheld laser tach arrived. The following are incermental results.
Boat tach_____ Handheld
550 rpm________650 rpm
I didn't check any higher as it won't rev any more than 1400 in gear
. Under load, in gear
seems very happy at 2300 rpm
but at 2450 starts to smoke & soot. These numbers make more sense as the navy
rates this setup at 25hp @ 2400 rpm. Motor
,tranny & prop are all original navy
specs. This boat is somewhere between 25 to 30 years old (haven't verified actual build date yet) & I have been running it between 1950 rpm & 2300 rpm for the last 3 years and it seems to be happy so I guess I'll just keep on chuggin'.
Thanks for the help & aloha..............Gerry